/* crypto/evp/evp_lib.c *//* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) * All rights reserved. * * This package is an SSL implementation written * by Eric Young (eay@cryptsoft.com). * The implementation was written so as to conform with Netscapes SSL. *  * This library is free for commercial and non-commercial use as long as * the following conditions are aheared to.  The following conditions * apply to all code found in this distribution, be it the RC4, RSA, * lhash, DES, etc., code; not just the SSL code.  The SSL documentation * included with this distribution is covered by the same copyright terms * except that the holder is Tim Hudson (tjh@cryptsoft.com). *  * Copyright remains Eric Young's, and as such any Copyright notices in * the code are not to be removed. * If this package is used in a product, Eric Young should be given attribution * as the author of the parts of the library used. * This can be in the form of a textual message at program startup or * in documentation (online or textual) provided with the package. *  * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the copyright *    notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright *    notice, this list of conditions and the following disclaimer in the *    documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software *    must display the following acknowledgement: *    "This product includes cryptographic software written by *     Eric Young (eay@cryptsoft.com)" *    The word 'cryptographic' can be left out if the rouines from the library *    being used are not cryptographic related :-). * 4. If you include any Windows specific code (or a derivative thereof) from  *    the apps directory (application code) you must include an acknowledgement: *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" *  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. *  * The licence and distribution terms for any publically available version or * derivative of this code cannot be changed.  i.e. this code cannot simply be * copied and put under another distribution licence * [including the GNU Public Licence.] */#include <stdio.h>#include "cryptlib.h"#include <openssl/evp.h>#include <openssl/objects.h>int EVP_CIPHER_param_to_asn1(EVP_CIPHER_CTX *c, ASN1_TYPE *type)	{	int ret;	if (c->cipher->set_asn1_parameters != NULL)		ret=c->cipher->set_asn1_parameters(c,type);	else		return -1;	return(ret);	}int EVP_CIPHER_asn1_to_param(EVP_CIPHER_CTX *c, ASN1_TYPE *type)	{	int ret;	if (c->cipher->get_asn1_parameters != NULL)		ret=c->cipher->get_asn1_parameters(c,type);	else		return -1;	return(ret);	}int EVP_CIPHER_get_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)	{	int i=0,l;	if (type != NULL) 		{		l=EVP_CIPHER_CTX_iv_length(c);		OPENSSL_assert(l <= sizeof c->iv);		i=ASN1_TYPE_get_octetstring(type,c->oiv,l);		if (i != l)			return(-1);		else if (i > 0)			memcpy(c->iv,c->oiv,l);		}	return(i);	}int EVP_CIPHER_set_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)	{	int i=0,j;	if (type != NULL)		{		j=EVP_CIPHER_CTX_iv_length(c);		OPENSSL_assert(j <= sizeof c->iv);		i=ASN1_TYPE_set_octetstring(type,c->oiv,j);		}	return(i);	}/* Convert the various cipher NIDs and dummies to a proper OID NID */int EVP_CIPHER_type(const EVP_CIPHER *ctx){	int nid;	ASN1_OBJECT *otmp;	nid = EVP_CIPHER_nid(ctx);	switch(nid) {		case NID_rc2_cbc:		case NID_rc2_64_cbc:		case NID_rc2_40_cbc:		return NID_rc2_cbc;		case NID_rc4:		case NID_rc4_40:		return NID_rc4;		case NID_aes_128_cfb128:		case NID_aes_128_cfb8:		case NID_aes_128_cfb1:		return NID_aes_128_cfb128;		case NID_aes_192_cfb128:		case NID_aes_192_cfb8:		case NID_aes_192_cfb1:		return NID_aes_192_cfb128;		case NID_aes_256_cfb128:		case NID_aes_256_cfb8:		case NID_aes_256_cfb1:		return NID_aes_256_cfb128;		case NID_des_cfb64:		case NID_des_cfb8:		case NID_des_cfb1:		return NID_des_cfb64;		default:		/* Check it has an OID and it is valid */		otmp = OBJ_nid2obj(nid);		if(!otmp || !otmp->data) nid = NID_undef;		ASN1_OBJECT_free(otmp);		return nid;	}}